Science says the blue whale’s evolutionary lineage traces directly to a small four-legged land animal that returned to the sea 50 million years ago – and the fossil sequence that documents the transformation has now been almost completely recovered
If you looked at a blue whale today and tried to guess its family tree, you probably wouldn’t imagine a dog-sized, hoofed land animal trotting around ancient riverbanks. Yet that is exactly what the fossil record now tells us. Over the last few decades, paleontologists have uncovered a surprisingly detailed step‑by‑step trail showing how whales ...









